423863018417 has 2 divisors, whose sum is σ = 423863018418. Its totient is φ = 423863018416.

The previous prime is 423863018413. The next prime is 423863018429. The reversal of 423863018417 is 714810368324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 390423775921 + 33439242496 = 624839^2 + 182864^2 .

It is a cyclic number.

It is not a de Polignac number, because 423863018417 - 2² = 423863018413 is a prime.

It is not a weakly prime, because it can be changed into another prime (423863018413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211931509208 + 211931509209.

It is an arithmetic number, because the mean of its divisors is an integer number (211931509209).

Almost surely, 2^423863018417 is an apocalyptic number.

It is an amenable number.

423863018417 is a deficient number, since it is larger than the sum of its proper divisors (1).

423863018417 is an equidigital number, since it uses as much as digits as its factorization.

423863018417 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 774144, while the sum is 47.

The spelling of 423863018417 in words is "four hundred twenty-three billion, eight hundred sixty-three million, eighteen thousand, four hundred seventeen".